APA ציטוט

Godin, S. (2002). Purple Cow: Transform your Questions (NA.). Penguin Books.

Chicago Style (17th ed.) Citation

Godin, Seth. Purple Cow: Transform Your Questions. NA. England: Penguin Books, 2002.

ציטוט MLA

Godin, Seth. Purple Cow: Transform Your Questions. NA. Penguin Books, 2002.